My son is in similar position he was born in Thialand up to age of 3 months then has lived in the UK for 18 years, he has now applied to join the British army and has been asked to get a liability letter saying he has no commitment to the thia military, he has contacted embassy of Thialand but they say they cannot provide this he has not registered for military in Thialand either so he is stuck could anyone advise thanks